Oven.



G. G. LEIDY.

OVEN.

APPLICATION FILED PBB.5, 191s.

Patented Nov. 3, 191i 2 SHEETS-#8111231 1.

m Wm M FT! R V6 0 mi m WITNESSES A 17. M

0. c. LEIDY OVEN.

APPLICATION FILED IBB.5, 1013.

1, 1 1 6,085, Patented Nov. 914.

2 SHEETS- ET 2.

WITNESSES INVEIV TQI? N j 'w jjQ l6 Chm/es- 6. Lady 55 BY M ATTORNEYS THE NORRIS PETERS L'O., PHOTIILITHJ, WASHINGI'ON. C.

enrrnn s'rnrns. PATENT onnron.

OVEN.

Specification of Letters Patent.

Application filed February 5, 1913. Serial No. 746,310.

"0 all whom it may concern 3 Be it known that I, CHARLES C. L'nrnY, a citizen of the United States, and a resident; of Jacksonville, in the county of Morgani and State of Illinois, have invented a new and Improved Oven, of which the following is a full, clear, and exact description.

The object of the invention is to provide an inexpensive, simple and efficient oven in which the cont 'action and expansion of the oven body structure is balanced by a granulated non-conducting material placed within the body structure of the oven.

Reference isto be had to the accompanying drawings forming a part of this specification, in which like characters of reference indicate corresponding parts in all the views, and in which Figure 1 is a vertical central section of an embodiment of my invention, through the line 11 of Fig. 3; Fig. 2 is a vertical cross sectionon the line 2--2 of Fig. 1; Fig. 3 is a horizontal section on the line 3--3 of Fig. 2, showing the bed of granulated material; and Fig. 4 is a horizontal section on the line H of Fig. 2, showing the horizontal contraction of the products of combustion.

Referring to the drawings, 10 represents a bakers oven provided with a furnace 11. The furnace is illustrated with a grate12, but if the oven is to be used with gas or liquid fuel the furnace will be modified accordingly. The arch 13 of the furnace is formed as customary, and is provided with two side openings 1d near the lower portion of the arch in each side and near the ends of the same. Through the openings 1% the products of combustion pass from the furnace to the side passages 15 extending alongside the lower portion of the furnace, the passages being formed by the lower portion of the furnace and the side walls 16 of the oven. Each of the passages 15 has a vertical outlet 17 formed in the front end of the oven. Lying directly over the central portion of the arch l3, and longitudinally of it, is a bed of granulated nonconducting material 18, preferably dry sand. The sides of the bed are formed by the tiles 19, and the top of same is covered by a tile 20, all inclosed in a body structure 21 forming part of the oven. Formed above the body 21 is a baking chamber 22, properly surrounded with passages for the prod ucts of combustion. Each of the outlets 17 which is the hottest.

has a triangular expansion .23, the longer side 24 of which formspart of a side wall of the baking ehainber, the height of this tmangle and the oven being the same. Each of the outlets 1.7 leads into a horizontal passage 25 extending longitiulinally of the oven,.and communicating at the rear end of the oven with another horizontal passage 26 pa 'allel to the passage \Viththe exception of the central partition 27 both of the passages 26 cover the upper surface of the top of the baking chamber, the products of combustion from these passages passing directly into the common fine 28 formed in the forward end of the oven.

By having a bed of dry sand in the body of the structureof the oven between the furnace and the baking chamber, the contraction produced in this portion of the oven after the expansion of the same is permitted by the grains of sand forming the bed. In view of this I can dispense with metallic members, such as I beams or similar shapes within this portion of the oven,

The presence of metallic members in this portion of the bed is not desirable, as, due to the unevenness of their coelliciency of expansion and contrac- MOD cracks are formed between the furnace and the baking chamber, which are very detrimental to the oven structure. The

sand having substantially the same coellicient of expansion as the body structure of the oven has not the tendency to form crevlces; furthermore, excessive contraction of the body of the oven in this particular portion causes the grains of sand to come closer together. I

To reinforce the body about the, arch 1. In an oven, a furnace; a baking chant,

ber above the furnace; a body structure separating said furnace from said chamber and forming an arch above the furnace;

tiles disposed longitudinally in the body and embodied therein above the central portion of the arch, said tiles forming an inclosure; and granular heat insulating material in said inclosure.

2. In an oven, a furnace; a baking cham- Iatented Nov. 3, 19M.

from which metallic elements are climi- 5 bedded therein and reinforcing said body above the furnace and forming an inclosure therein; and a granular heat insulating 1naterial in said inclosure.

3. In an oven, a furnace; a baking cham- 10 her above said furnace; a body structure separating said furnace from said chamber and forming an arch above the furnace; tiles disposed longitudinally 1n the body and entirely embedded therein above the central portion of the arch, said tile form- .ing an inclosure of uniform Width and sub stantially of uniform height from end to end of said arch; and granular heat insulating material in said inclosure.

' In testimony whereof I have signed my name to this specification in the presence of tWo subscribing Witnesses.

CHARLES CARROLL LEIDY. Witnesses ASA MEADE ROBINSON,

JOE C. FEMANDER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Eatenta, Washington, D. G. 

